Steam-boiler



(No Model.) 2 Sheets-Sheet 1.

S. P. HEDGES.

STEAM BOILER. N0. 388,198. Patented Aug. 21, 1888.

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(No Model.) 2 Sheets-Sheet 2.

S. P. HEDGBS.

STEAM BOILER.

Patented Aug. 21, 1888.

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UNITED STATES PATENT OFFICE.

SAMUEL I. HEDGES, OF GREENIORT, NEW YORK.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 388,198, dated August21, 1888.

Application filed January '27, 1888. Serial No. 262,113. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL P. HEDGEs, of Greenport, in the county ofSuffolk and State of New York, have invented a new and ImprovedSteam-Boiler, of which the following is a full, clear, and exactdescription.

My invention relates to steam-boilers, and has for its object to improvethe construction set forth in Letters Patent granted to myself July 8,1884, No. 301,590, and April 21, 1885, No. 316,144, whereby a moreperfect circulation will be obtained and the products ofcombustion beutilized to a maximum extent.

The invention consists in the construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures of reference indicatecorresponding parts in all the views.

Figure 1 is avertical central section through the boiler. Fig. 2 is atransverse section on line 2 2 of Fig. 1, and Fig. 3 is a similarsection on line 3 3. Fig. 4 is a detail view.

In carrying out the invention within the cylindrical casing 10, at ornear the base, a suit able shaking and dumping grate, 11, ishorizontally supported in any approved manner.

Above the grate the fire-box 12 is constructed, consisting of aninteriorly'flanged ring, 13, a coil of pipe, 14, resting upon saidflange of the ring a distance from the casing, and a cap-plate, 15,supported upon the upper end of the coil attached or independent of thecasing, as in practice may be found desirable. The interior of thefirebox or the inner face of the coil 14 is preferably provided with aproper lining to prevent the said coil from burning.

Above the fire-box 12 an inverted-T-shaped stand-pipe, 16, is supportedby means of a leg or legs, 17, projected downward from the under surfaceof the horizontal member 18 through the space 19 intervening thefire-pot and casing to a bearing upon the base-ring 13, as bestillustrated in Fig. 1. The said standpipe is further supported byintersecting hori zontal outletpipes 20 and 21, which project outwardthrough the casing, the pipe 20 being connected with the horizontalmember 18 and the pipe 21 with the vertical member 22 at or near theupper end. This pipe 21 forms the steam'exit or delivery pipe.

From the sides of the horizontal member of the stand-pipe a series oftubes, 23, are horizontally and outwardly projected, and similar tubes,24, are made to radiate from the entire circumference of the verticalmember. The extremities of these tubes 23 and 24 are welded to inclosethe same with a rounding surface, as illustrated at 25, whereby thetubes at that point are enabled to better resist the heat and remaintight than when closed with an in serted head or cap.

As illustrated in Fig. 4, a smaller circulating-tube, 26, may beintroduced concentrically within the horizontal projecting tubes, iffound desirable, and I contemplate the use of such to draw in the coolerWater as the wa- 7o ter which has been heated passes off.

The upper end of the coil 14 is carried upward at one side of the member18, as shown at 27, of the stand-pipe, connecting with an L-branch, 28,which branch is entered the vertical member of the stand-pipe at theWaterline, as best illustrated in Fig. 1. The lower end, 29, of the coilis carried horizontally through the space 19 outside the casing, and thesaid end 29, together with the outlet-pipes 8o 20 and 21, are unitedwith a perpendicular supply-pipe, 30, provided with the usual gage,

31, the lower end of said pipe being adapted to admit water to the coil,and the upper end, having a safety-valve attached, being adapted tosupply steam.

In order that the products of combustion will not pass upward upon oneside of the stand-pipe more than upon the other, I have provided aseries of segmental baffle-plates, o 32, which plates are horizontallyand alternately arranged upon each side of the stand pipe abovethehorizontal member, each baffle plate being fitted to the cylindricalsurface of the vertical member, and likewise to the inner contour of thecasing, as illustrated in Fig. 2. By means of these baffie-plates theproducts of combustion are compelled to pass upward in a circuitouscourse to find an exit through the off-take flue 33.

In operation the water being heated in the fire-box rises with the steamgenerated, and,

passing up the pipe 2? through the pipe 28, enters the stand-pipe andits radial projections, the steam finding an exit through branch pipe 21nto the supply-pipe 30. The water meanwhlle, passing down the verticalmember of the stand-pipe, enters the horizontal member, from whence,through the outlet 20, it is dellvered to the lower end of thesupply-pipe 30 33d again enters the coil through the pipe It will thenbe observed that a constant and perfect circulation is effected and thatthe construction and arrangement of the entire bo ler is simple,economical, and safe.

It will also be observed,as heretofore stated, that the products ofcombustion are utilized to the greatest extent as deflected by thesegmental plates, the heat is brought in uniform contact with all partsof the boiler, and that the tubes upon one side are heated at all tiuu sand under all conditions equally with those upon the other sides.

The boiler is provided with the usual draft and furnace door, and in theside convenient to the deflectingplates a capped man-hole or man-holesare provided, preferably so positioned as that the edge of the oppositeplate will be in approximate alignment with the center of the opening.By means of the manholes the plates may be readily freed from anyaccumulation of dust or ashes.

Having thus described my in\'ention,what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination, with an inverted-T- shaped stand-pipe provided witha series of horizontally-projecting tubes, of a coil cncir cling thefire-box, connected with said standpipe, and an outer delivery pipeconnected with said stand-pipe and the coil, substantially as shown anddescribed, whereby a constant and thorough circulation is obtained, asset forth.

2. The combination, with an inverted-T- shaped stand-pipe provided withradiating horizontal capped tubes, of a coil encircling the fire box andconnected with the vertical member of the stand-pipe, and adelivery-pipe connected with the stand-pipe above the coilconnection,substantially as shown and de scribed.

3. The combination, with an inverted-T- shaped stand-pipe and a seriesof horizontal tubes radiating therefrom, having their ends closed, of acoil encircling the fire-box, connected with the vertical member of thestandpipe, an outer delivery-pipe connected to the vertical member ofthe stand-pipe above the coil-connection, and a tubular connectionbetween the horizontal member of the standpipe, the coil, anddelivery-pipe, all combined to operate substantially in the manner setforth.

4. The combination, with an inverted-T- shaped stand-pipe provided witha series of horizontallyprojecting tubes, a coil encircling the fire-boxconnected with the standpipc, and a steam-delivery pipe connected withthe standpipe above the coil-connection, of a series of segmentalbaffle-platcs alternately ar ranged above the horizontal member of thestand-pipe and top of the boiler, substantially as shown and described.

5. The combination, with an inverted-T- shaped stand-pipe, a series ofhorizontal tubes projecting from the same, a coil encircling thefire-box and connected with the stand-pipe about centrally thereof, anda supply-pipe connected to the vertical memberefsaid standpipe near thetop and to the horizontal member and coil, of a series of spacedsegmental baflle-platcs alternately arranged above the horizontal memberof the stand-pipe and top of the boiler-casing, substantially as shownand described.

SAMUEL P. HEDGES.

\Vitnesses:

\VILLIAM B. Rnnvn, CARRIE M. REEVE.

